Proximity Controls Division of Dwyer Instruments, Inc.

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Proximity Controls began in 1965 in Fergus Falls, MN. Starting with the Ultra-Mag Series of diaphragm level controls and expanding into position indicators in 1977 with the Mark Series which offers a patented magnetic drive that completely seals the switch compartment. Acquired in 1989 by Dwyer Instruments of Michigan City, IN., they continue the innovative spirit developing new products such as the Quick-View and Detector position indicating controls and the PLS rotating Paddle Level Switch.